Combining Philosophers

Ideas for Peter Geach, Gottfried Leibniz and Aristotle

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4 ideas

5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

12992

Logic teaches us how to order and connect our thoughts [Leibniz]

5. Theory of Logic / A. Overview of Logic / 4. Pure Logic

19370

'Blind thought' is reasoning without recognition of the ingredients of the reasoning [Leibniz, by Arthur,R]

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

12376

Demonstrations by reductio assume excluded middle [Aristotle]

5. Theory of Logic / A. Overview of Logic / 7. Second-Order Logic

11033

Predications of predicates are predications of their subjects [Aristotle]